Plaster anchor



l. A. BAUM PLASTER ANCHOR June 2, 1931.

Filed July 22, 1929 Patented June 2, 1931 UNITED STATES ISAAC A. BAUM, OF CHICAGO, ILLINOIS PLASTER ANCHOR Application led July 22,

My invention relates to meansfor framing wall openings and particularly to novel means for anchoring plaster to a metal frame.

Inasmuch as plaster does not readily or 5 securely adhere to metal surfaces, suitable means must be provided for effecting a firm anchor or bond between the plaster at the point of termination and the metal frame. The means here disclosed is of very simple form and is effective for accomplishing the desired result inasmuch as it insures contact of the plaster with the masonry beneath the metal surfaces.

The invention will be more readily understood by reference to the accompanying drawing in which the gure is a perspective view partly in section and partly broken away of a door frame arranged in accordance with my invention.

In the drawing, I have illustrated a metal frame member of generally channel form comprising a web 10, constituting a door j amb, a doorstep 11 being formed in the metal of the web. F langes 12 project rearwardly from the jamb and are adapted to lie against the surfaces of a masonry wall such as tile or brick.

To the outside faces of the flanges 12 are welded continuous L-shaped strips 13 having rebent margins 14, the strips acting as plaster terminals and grounds.

The metal ot' the flanges 12 to the rear of the strips 13 is pressed outwardly at spaced intervals, the pressed-out portions 15 being aperturerd or slitted as at 16 to permit the plaster to pass through the surface of the metal into the pocket 17 and to contact and adhere to the masonry. l may prefer also to provide struck-out loops 1S at points between the pressed out portions.

The number and extent of the pressed-out portions is a matter of choice as well as the shapeV of the apertures 16. The form of the pressed out portions shown in the drawing is preferred inasmuch as the arrangement serves to stiften the flanges 12 and give them additional rigidity under laterally applied blows to the frame. However, any form of distortion of the metal by which the plaster is enabled to attach itself to the masonry be- 1929. serial No. 380,207.

nature.

ISAAC A. BAUM. 

